The sector of an economy is involved in the acquisition of raw materials.

Primary

Explanation:

There are 4 sectors in an economy

Primary: extraction and production of raw materials, like agriculture, mining and fishing.

Secondary: manufacturing and processing, like construction, manufacturing of goods.

Tertiary: Provides intangible goods to consumers, like service industry. healthcare. legal services. insurance and banking.

Quaternary: intellectual aspect, like education and research